More Problems

• Count the number of nodes with two children in a binary tree.
• Implement a function to check if a binary search tree can be balanced.
• Find the first common ancestor of two nodes in a binary tree.
• Create a function to convert a binary tree to a doubly linked list.
• Find the maximum sum of any path in a binary search tree.
• Check if a binary tree can be folded symmetrically.
• Implement a function to calculate the sum of nodes in a binary tree.
• Find the minimum number of swaps required to sort a binary tree.